On Thu, Jun 07, 2018 at 02:19:15PM -0500, Gustavo A. R. Silva wrote:
> In case memory resources for *ucmd* were allocated, release them
> before return.
>
> Addresses-Coverity-ID: 1469857 ("Resource leak")
> Fixes: 3b3233fbf02e ("IB/mlx5: Add flow counters binding support")
> Signed-off-by: Gustavo A. R. Silva <gustavo@xxxxxxxxxxxxxx>
> drivers/infiniband/hw/mlx5/main.c | 33 +++++++++++++++++++++------------
> 1 file changed, 21 insertions(+), 12 deletions(-)
>
> diff --git a/drivers/infiniband/hw/mlx5/main.c b/drivers/infiniband/hw/mlx5/main.c
> index e52dd21..0472e6c 100644
> +++ b/drivers/infiniband/hw/mlx5/main.c
> @@ -3546,29 +3546,35 @@ static struct ib_flow *mlx5_ib_create_flow(struct ib_qp *qp,
> return ERR_PTR(-ENOMEM);
>
> err = ib_copy_from_udata(ucmd, udata, required_ucmd_sz);
> - if (err) {
> - kfree(ucmd);
> - return ERR_PTR(err);
> - }
> + if (err)
> + goto free_ucmd;
> }
>
> - if (flow_attr->priority > MLX5_IB_FLOW_LAST_PRIO)
> - return ERR_PTR(-ENOMEM);
> + if (flow_attr->priority > MLX5_IB_FLOW_LAST_PRIO) {
> + err = -ENOMEM;
> + goto free_ucmd;
> + }
>
> if (domain != IB_FLOW_DOMAIN_USER ||
> flow_attr->port > dev->num_ports ||
> (flow_attr->flags & ~(IB_FLOW_ATTR_FLAGS_DONT_TRAP |
> - IB_FLOW_ATTR_FLAGS_EGRESS)))
> - return ERR_PTR(-EINVAL);
> + IB_FLOW_ATTR_FLAGS_EGRESS))) {
> + err = -EINVAL;
> + goto free_ucmd;
> + }
>
> if (is_egress &&
> (flow_attr->type == IB_FLOW_ATTR_ALL_DEFAULT ||
> - flow_attr->type == IB_FLOW_ATTR_MC_DEFAULT))
> - return ERR_PTR(-EINVAL);
> + flow_attr->type == IB_FLOW_ATTR_MC_DEFAULT)) {
> + err = -EINVAL;
> + goto free_ucmd;
> + }
>
> dst = kzalloc(sizeof(*dst), GFP_KERNEL);
> - if (!dst)
> - return ERR_PTR(-ENOMEM);
> + if (!dst) {
> + err = -ENOMEM;
> + goto free_ucmd;
> + }
>
> mutex_lock(&dev->flow_db->lock);
>
> @@ -3640,6 +3646,9 @@ static struct ib_flow *mlx5_ib_create_flow(struct ib_qp *qp,
> kfree(ucmd);
> kfree(handler);
> return ERR_PTR(err);
> +free_ucmd:
> + kfree(ucmd);
> + return ERR_PTR(err);
> }
This hunk is a bit wonky, can we do this instead? handle never needs
to be freed.
destroy_ft:
put_flow_table(dev, ft_prio, false);
if (ft_prio_tx)
put_flow_table(dev, ft_prio_tx, false);
unlock:
mutex_unlock(&dev->flow_db->lock);
kfree(dst);
free_ucmd:
kfree(ucmd);
return ERR_PTR(err);
}
Jason
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